Voiceprint sensor circuit of combined power fan blade

Abstract

The utility model provides a voiceprint sensor circuit of a combined power fan blade, which belongs to the technical field of fan blades and comprises a first differential mode interference elimination module, a second differential mode interference elimination module, a first common mode interference elimination module and a third differential mode interference elimination module, the first differential mode interference elimination module is used for eliminating differential mode static electricity, electrical fast transient pulse train and differential mode surge interference of the direct current power supply, the second differential mode interference elimination module is used for eliminating differential mode static electricity interference, and the first common mode interference elimination module is used for eliminating common mode surge and electrical fast transient pulse train interference. And the third differential mode interference elimination module is used for eliminating differential mode surge and electrical fast transient burst interference. According to the scheme, the protection performance of the voiceprint sensor can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fan blades, in particular to a voiceprint sensor circuit of a combined power fan blade. BACKGROUND

[0002] As one of the key components of a wind turbine generator, the fan blade directly affects the power generation efficiency of the wind turbine generator. The fan blade works in high altitude and all-weather conditions and is often attacked by air medium, atmospheric radiation, sand and dust, lightning, heavy rain and snow, which can easily cause damage to the fan blade.

[0003] The fan blade has certain requirements for the protection performance of the voiceprint sensor. However, the protection performance of the voiceprint sensor in the prior art is poor, and it cannot be used in harsh environments. Therefore, how to improve the protection performance of the voiceprint sensor becomes a problem to be solved. CONTENT OF THE INVENTION

[0004] The purpose of the present application is to provide a voiceprint sensor circuit of a combined power fan blade, which can solve the problem of poor protection performance of the voiceprint sensor in the prior art.

[0005] In a first aspect, the embodiments of the present application provide a voiceprint sensor circuit of a combined power fan blade, which comprises: a first differential mode interference elimination module, a second differential mode interference elimination module, a first common mode interference elimination module and a third differential mode interference elimination module.

[0006] The first end and the second end of the first differential mode interference elimination module are connected to the input end of the direct current power supply, the third end of the first differential mode interference elimination module is connected to the first end of the first common mode interference elimination module, the fourth end of the first differential mode interference elimination module is connected to the second end of the first common mode interference elimination module, and the first differential mode interference elimination module is used to eliminate the differential mode static electricity, the electric fast transient impulse group and the differential mode surge interference of the direct current power supply.

[0007] The second differential mode interference elimination module is connected to the high bit data line and the low bit data line of the differential signal line of the communication bus, and is used to eliminate the differential mode static electricity interference.

[0008] The first common mode interference elimination module is used to eliminate the common mode surge and the electric fast transient impulse group interference.

[0009] The third differential mode interference elimination module is connected in parallel with the first differential mode interference elimination module, and is used to eliminate the differential mode surge and the electric fast transient impulse group interference.

[0010] In a possible implementation of the first aspect, the circuit further comprises a terminal, a power supply positive pole pin of the terminal is connected with the direct current power supply positive input end, a power supply negative pole pin of the terminal is connected with the direct current power supply negative input end, a high level signal pin of the terminal is connected with a high bit data line of the differential signal line of the communication bus, and a low level signal pin of the terminal is connected with a low bit data line of the differential signal line of the communication bus.

[0011] The first differential mode interference elimination module comprises a first ESD static protection diode and a first varistor.

[0012] The cathode of the first ESD static protection diode is connected with the power supply negative pole pin of the terminal and the first end of the first varistor, and the anode of the first ESD static protection diode is connected with the power supply positive pole pin of the terminal and the second end of the first varistor.

[0013] The cathode of the first ESD static protection diode is used as the first direct current power supply output end, and the anode of the first ESD static protection diode is also connected with the ground.

[0014] In a possible implementation of the first aspect, the second differential mode interference elimination module comprises a second ESD static protection diode and a third ESD static protection diode.

[0015] The anode of the second ESD static protection diode is connected with the high level signal pin of the terminal, the cathode of the third ESD static protection diode is connected with the low level signal pin of the terminal, and the cathode of the second ESD static protection diode and the anode of the third ESD static protection diode are connected with the ground.

[0016] In a possible implementation of the first aspect, the first common mode interference elimination module comprises a second varistor and a third varistor.

[0017] The first end of the second varistor is connected with the power supply positive pole pin of the terminal, and the second end of the second varistor is connected with the protection ground line.

[0018] The first end of the third varistor is connected with the power supply negative pole pin of the terminal, and the second end of the third varistor is connected with the protection ground line.

[0019] In a possible implementation of the first aspect, the third differential mode interference elimination module comprises a first transient voltage suppression diode, and the first transient voltage suppression diode is connected in parallel with the first differential mode interference elimination module.

[0020] In a possible implementation of the first aspect, the circuit further comprises a first inductor, a first self-recovery fuse and an electrolytic capacitor.

[0021] The first end of the first inductor is connected with the positive pole pin of the terminal of the power supply, the second end of the first inductor is connected with the first end of the first self-resetting fuse, and the first inductor is used for filtering high-frequency interference of the DC power supply line;

[0022] The second end of the first self-resetting fuse is connected with the first end of the third differential mode interference elimination module, the second end of the first self-resetting fuse and the first end of the electrolytic capacitor constitute a second DC power supply output end, and the first self-resetting fuse is used for short-circuit protection of the DC power supply line;

[0023] The second end of the electrolytic capacitor is connected with the second end of the third differential mode interference elimination module, and the electrolytic capacitor is used for voltage stabilization and ripple elimination.

[0024] In a possible implementation of the first aspect, the circuit further comprises a second common mode interference elimination module, a third common mode interference elimination module, and a fourth differential mode interference elimination module;

[0025] The second common mode interference elimination module is connected with high-bit data lines and low-bit data lines of differential signal lines of the communication bus, and is used for eliminating common mode surge and electrical fast transient burst interference;

[0026] The third common mode interference elimination module is connected in parallel with the second common mode interference elimination module, and is used for eliminating common mode surge and electrical fast transient burst interference;

[0027] The fourth differential mode interference elimination module is connected in parallel with the third common mode interference elimination module, and is used for eliminating differential mode surge and electrical fast transient burst interference.

[0028] In a possible implementation of the first aspect, the second common mode interference elimination module comprises a first gas discharge tube and a second gas discharge tube;

[0029] The first gas discharge tube and the second gas discharge tube are connected in series between the differential signal lines, and a series connection node of the first gas discharge tube and the second gas discharge tube is connected with the protection ground line.

[0030] In a possible implementation of the first aspect, the third common mode interference elimination module comprises a second transient voltage suppression diode, and the fourth differential mode interference elimination module comprises a third transient voltage suppression diode and a fourth transient voltage suppression diode;

[0031] The second transient voltage suppression diode is connected in parallel with the second common mode interference elimination module, the third transient voltage suppression diode and the fourth transient voltage suppression diode are connected in series between the differential signal lines, and a series connection node of the third transient voltage suppression diode and the fourth transient voltage suppression diode is grounded.

[0032] In a possible implementation of the first aspect, the circuit further comprises a second self-resetting fuse and a third self-resetting fuse;

[0033] The first end of the second self-resetting fuse is connected with the first end of the second common-mode interference elimination module, and the second end of the second self-resetting fuse is connected with the first end of the third common-mode interference elimination module, and the second self-resetting fuse is used for short-circuit protection of the differential signal line.

[0034] The first end of the third self-resetting fuse is connected with the second end of the second common-mode interference elimination module, and the second end of the third self-resetting fuse is connected with the second end of the third common-mode interference elimination module, and the third self-resetting fuse is used for short-circuit protection of the differential signal line.

[0035] The voiceprint sensor circuit of the joint power fan blade provided in the application comprises a first differential-mode interference elimination module, a second differential-mode interference elimination module, a first common-mode interference elimination module and a third differential-mode interference elimination module, the first differential-mode interference elimination module is used for eliminating differential-mode static electricity, an electric fast transient pulse group and a differential-mode surge interference, the second differential-mode interference elimination module is used for eliminating a differential-mode static electricity interference, the first common-mode interference elimination module is used for eliminating a common-mode surge and an electric fast transient pulse group interference, and the third differential-mode interference elimination module is used for eliminating a differential-mode surge and an electric fast transient pulse group interference.

[0036] The scheme provided in the application provides a differential-mode interference elimination module and a common-mode interference elimination module, which can eliminate differential-mode interference and common-mode interference, thereby improving the protection performance of the voiceprint sensor, can be used in a harsh environment, and has strong ease of use and practicality.

[0037] Other features and advantages of the application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative labor.

[0039] Figure 1 is the overall structure schematic diagram of the voiceprint sensor circuit of the joint power fan blade provided in the embodiments of the application;

[0040] Figure 2 is the specific structure schematic diagram of the voiceprint sensor circuit of the joint power fan blade provided in the embodiments of the application;

[0041] Figure 3 is the overall structure schematic diagram of the voiceprint sensor circuit of the joint power fan blade provided in the embodiments of the application;

[0042] Figure 4is a specific structural schematic diagram of a voiceprint sensor circuit of a combined power fan blade provided by an embodiment of the present application. DETAILED DESCRIPTION

[0043] In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular sequences of steps, techniques, etc., in order to provide a thorough understanding of the present embodiments. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, circuits, and methods are omitted so as not to obscure the description of the present application.

[0044] It is to be understood that the terminology "includes", "has", "holds", "contains" or "comprising", when used in this specification and in the following claims, indicates the presence of the described features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0045] It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0046] It will be further understood that the terms "and / or", "including", "comprising" when used in this specification and in the following claims, specify the presence of features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0047] As used in this specification and the appended claims, the term "if" can be construed to mean "when" or "once" or "in response to a determination" or "in response to a monitoring of" that a stated condition or event has occurred, is occurring, or will occur. Similarly, the phrase "if determined" or "if monitored" can be construed to mean "once determined" or "in response to a determination" or "once monitored" or "in response to a monitoring" that a stated condition or event has occurred, is occurring, or will occur.

[0048] In addition, in the description of the present application, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0049] Reference in the specification to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places in the specification are not necessarily all referring to the same embodiment, although it can. The terms "including," "comprising," "having" and variations thereof are meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0050] In the present specification, the orientation words such as "upper", "lower", "left", "right" are used in the sense of the orientation or positional relationship shown in the drawings or the orientation or positional relationship usually placed when the product of the present application is used, unless otherwise specified.

[0051] In the present specification, it is further noted that, unless otherwise explicitly specified and limited, the terms "arranged", "mounted", "connected", "linked" should be understood in a broad sense, for example, can be fixedly connected, or detachably connected, or integrally connected, can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] The fan blade is one of the key components of the wind turbine generator set, and its state directly affects the power generation efficiency of the wind turbine generator set. The fan blade works in high altitude and all-weather conditions, and is often attacked by air medium, atmospheric radiation, sand and dust, lightning, heavy rain, ice and snow, which can easily cause damage to the fan blade.

[0053] The fan blade has certain requirements for the protection performance of the voiceprint sensor, however, the protection performance of the voiceprint sensor in the prior art is poor, and it cannot be used in harsh environments. Therefore, how to improve the protection performance of the voiceprint sensor becomes a problem to be solved.

[0054] In view of the above defects, the voiceprint sensor circuit of the combined power fan blade provided by the embodiments of the present application comprises: a first differential mode interference elimination module, a second differential mode interference elimination module, a first common mode interference elimination module and a third differential mode interference elimination module. The first differential mode interference elimination module is used to eliminate differential mode static electricity, electric fast transient impulse group and differential mode surge interference of the direct current power supply. The second differential mode interference elimination module is used to eliminate differential mode static electricity interference. The first common mode interference elimination module is used to eliminate common mode surge and electric fast transient impulse group interference. The third differential mode interference elimination module is used to eliminate differential mode surge and electric fast transient impulse group interference.

[0055] The application scheme provides a differential mode interference elimination module and a common mode interference elimination module, which can eliminate differential mode interference and common mode interference, thereby improving the protection performance of a voiceprint sensor, can be used in a harsh environment, and has strong ease of use and practicality.

[0056] The specific process implemented by the application will be described below through specific examples.

[0057] Please refer to Figure 1 , Figure 1 is the overall structure schematic diagram of the voiceprint sensor circuit of the joint power fan blade provided by the embodiment of the application. As Figure 1 shown, the circuit 100 includes a first differential mode interference elimination module 110, a second differential mode interference elimination module 120, a first common mode interference elimination module 130, and a third differential mode interference elimination module 140.

[0058] The first end and the second end of the first differential mode interference elimination module 110 are connected to the DC power input end BUS, the third end of the first differential mode interference elimination module 110 is connected to the first end of the first common mode interference elimination module 130, and the fourth end of the first differential mode interference elimination module 110 is connected to the second end of the first common mode interference elimination module 130. The first differential mode interference elimination module 110 is used to eliminate differential mode static electricity, electric fast transient pulse group and differential mode surge interference of the DC power supply.

[0059] In one embodiment, the first end of the first differential mode interference elimination module 110 is connected to the positive input end of the DC power supply, and the second end of the first differential mode interference elimination module 110 is connected to the negative input end of the DC power supply.

[0060] The second differential mode interference elimination module 120 is connected to the high data line CANH and the low data line CANL of the differential signal line of the communication bus, and is used to eliminate differential mode static interference. The first common mode interference elimination module 130 is used to eliminate common mode surge and electric fast transient pulse group interference. The communication bus can be a CAN (Controller Area Network, CAN bus) or other bus.

[0061] The third differential mode interference elimination module 140 is connected in parallel with the first differential mode interference elimination module 110, and is used to eliminate differential mode surge and electric fast transient pulse group interference.

[0062] It should be noted that the circuit 100 is used as a protection circuit, and the right side of the third differential mode interference elimination module 140 is connected to an LDO circuit (voltage reducing and stabilizing circuit), which is not shown in the figure and is not used as a protection circuit.

[0063] Please refer to Figure 2 , Figure 2is a specific structural schematic diagram of a voiceprint sensor circuit of a combined power fan blade provided by the embodiment of the application. As shown in Figure 2 The circuit 100 further includes a terminal J1.

[0064] The positive electrode pin 3 of the terminal J1 is connected with the positive electrode input end of the direct current power supply, and the negative electrode pin 4 of the terminal J1 is connected with the negative electrode input end of the direct current power supply. The high level signal pin 1 of the terminal J1 is connected with the high bit data line CANH of the differential signal line of the communication bus, and the low level signal pin 2 of the terminal J1 is connected with the low bit data line CANL of the differential signal line of the communication bus.

[0065] In one embodiment, the high level signal pin 1 is a first pin, the low level signal pin 2 is a second pin, the positive electrode pin 3 is a third pin, and the negative electrode pin 4 is a fourth pin. The positions of the signal pins and the power supply pins can be interchanged, which is not specifically limited here.

[0066] Please continue to refer to Figure 2 According to an embodiment of the application, the first differential mode interference elimination module 110 includes a first ESD static protection diode E1 and a first pressure-sensitive resistor RV1. The cathode of the first ESD static protection diode E1 is connected with the negative electrode pin 4 of the terminal J1 and the first end of the first pressure-sensitive resistor RV1, and the anode of the first ESD static protection diode E1 is connected with the positive electrode pin 3 of the terminal J1 and the second end of the first pressure-sensitive resistor RV1.

[0067] The cathode of the first ESD static protection diode E1 is a first direct current power supply output end VOUT1, and the anode of the first ESD static protection diode E1 is also grounded.

[0068] Please continue to refer to Figure 2 According to an embodiment of the application, the second differential mode interference elimination module 120 includes a second ESD static protection diode E2 and a third ESD static protection diode E3.

[0069] The anode of the second ESD static protection diode E2 is connected with the high level signal pin 1 of the terminal J1, the cathode of the third ESD static protection diode E3 is connected with the low level signal pin 2 of the terminal J1, and the cathode of the second ESD static protection diode E2 and the anode of the third ESD static protection diode E3 are grounded.

[0070] Please continue to refer to Figure 2According to an embodiment of the present application, the first common mode interference elimination module 130 comprises a second voltage-dependent resistor RV2 and a third voltage-dependent resistor RV3. The first end of the second voltage-dependent resistor RV2 is connected to the positive power supply pin 3 of the terminal J1, and the second end of the second voltage-dependent resistor RV2 is connected to the protective ground line PE. The first end of the third voltage-dependent resistor RV3 is connected to the negative power supply pin 4 of the terminal J1, and the second end of the third voltage-dependent resistor RV3 is connected to the protective ground line PE.

[0071] Please continue to see Figure 2 According to an embodiment of the present application, the third differential mode interference elimination module 140 comprises a first transient voltage suppression diode D1, which is connected in parallel with the first differential mode interference elimination module 110.

[0072] Please continue to see Figure 2 According to an embodiment of the present application, the circuit 100 further comprises a first inductor L1, a first self-resetting fuse PPTC1, and an electrolytic capacitor C1.

[0073] The first end of the first inductor L1 is connected to the positive power supply pin 3 of the terminal J1, and the second end of the first inductor L1 is connected to the first end of the first self-resetting fuse PPTC1. The first inductor L1 is used to filter out high-frequency interference of the direct current power line.

[0074] The second end of the first self-resetting fuse PPTC1 is connected to the first end of the third differential mode interference elimination module 140, and the second end of the first self-resetting fuse PPTC1 and the first end of the electrolytic capacitor C1 constitute a second direct current power output end VOUT2. The first self-resetting fuse PPTC1 is used for short-circuit protection of the direct current power line.

[0075] The second end of the electrolytic capacitor C1 is connected to the second end of the third differential mode interference elimination module 140. The electrolytic capacitor C1 is used for voltage stabilization and interference elimination, but not as a main protection device.

[0076] Please see Figure 3 , Figure 3 is the overall structure schematic diagram of the voiceprint sensor circuit of the combined power fan blade provided by the embodiment of the present application. As shown in Figure 3 , the circuit further comprises a second common mode interference elimination module 150, a third common mode interference elimination module 160, and a fourth differential mode interference elimination module 170.

[0077] The second common mode interference elimination module 150 is connected to the high-bit data line CANH and the low-bit data line CANL of the differential signal line of the communication bus, and is used for eliminating common mode surge and electric fast transient burst interference. The third common mode interference elimination module 160 is connected in parallel with the second common mode interference elimination module 150, and is used for eliminating common mode surge and electric fast transient burst interference.

[0078] The fourth differential mode interference elimination module 170 is connected in parallel with the third common mode interference elimination module 160, and is configured to eliminate differential mode surge and electrical fast transient impulse group interference.

[0079] Please refer to Figure 4 , Figure 4 is a specific structural schematic diagram of the voiceprint sensor circuit of the combined power fan blade provided in the embodiments of the present application. As shown in Figure 4 , the second common mode interference elimination module 150 includes a first gas discharge tube GDT1 and a second gas discharge tube GDT2.

[0080] The first gas discharge tube GDT1 and the second gas discharge tube GDT2 are connected in series between the differential signal lines, and a connection node of the first gas discharge tube GDT1 and the second gas discharge tube GDT2 is connected with the protective ground wire PE.

[0081] In one embodiment, the gas discharge tube can be a ceramic gas discharge tube or other gas discharge tube, which is not specifically limited here.

[0082] Please continue to refer to Figure 4 , according to an embodiment of the present application, the third common mode interference elimination module 160 includes a second transient voltage suppression diode D2. The fourth differential mode interference elimination module 170 includes a third transient voltage suppression diode D3 and a fourth transient voltage suppression diode D4.

[0083] The second transient voltage suppression diode D2 is connected in parallel with the second common mode interference elimination module 150, the third transient voltage suppression diode D3 and the fourth transient voltage suppression diode D4 are connected in series between the differential signal lines, and a connection node of the third transient voltage suppression diode D3 and the fourth transient voltage suppression diode D4 is grounded.

[0084] Please continue to refer to Figure 4 , according to an embodiment of the present application, the circuit further includes a second self-resetting fuse PPTC2 and a third self-resetting fuse PPTC3.

[0085] The first end of the second self-resetting fuse PPTC2 is connected with the first end of the second common mode interference elimination module 150, the second end of the second self-resetting fuse PPTC2 is connected with the first end of the third common mode interference elimination module 160, and the second self-resetting fuse PPTC2 is configured to perform short circuit protection on the differential signal lines.

[0086] The first end of the third self-resetting fuse PPTC3 is connected with the second end of the second common mode interference elimination module 150, the second end of the third self-resetting fuse PPTC3 is connected with the second end of the third common mode interference elimination module 160, and the third self-resetting fuse PPTC3 is configured to perform short circuit protection on the differential signal lines.

[0087] In some embodiments, the voiceprint sensor device suitable for high-altitude cold area combined power fan blades comprises: a sensor shell, a sensor circuit board core unit, a connector and a protection module (i.e. voiceprint sensor circuit 100), the protection module is connected with a power supply conditioning module, used for providing lightning protection, improving the insulation performance of the sensor, so that the protection performance of the sensor is improved. The device can improve the reliability of data acquisition and adaptability in harsh environment of wind field.

[0088] It should be noted that the device is generally installed at a position 1 / 3 of the total length of the fan blade from the blade root, and the fan blade data acquisition device is installed on the hub and rotates with the impeller. The voiceprint sensor device is installed inside the blade and installed at a position extending forward by about 30m. The multi-core cable of the voiceprint sensor device adopts s-shaped wiring and is adhered to the root of the fan blade with strong glue.

[0089] The voiceprint sensor device adopts a material similar to the fan blade, i.e. glass fiber material. Glass fiber is an inorganic non-metallic material with excellent performance, with many types, good insulation, high heat resistance, good corrosion resistance and high mechanical strength. It is made of glass balls or waste glass as raw materials through high-temperature melting, wire drawing, winding and weaving processes, and the diameter of its single wire is several microns to twenty microns.

[0090] The voiceprint sensor device establishes good grounding contact between the shielding layer of the connecting line and the ground, so that the excess charge of the device can be released in time. At the same time, it can also suppress lightning pulses and prevent electromagnetic wave interference.

[0091] The outer surface of the voiceprint sensor device adopts a powder electrostatic spraying process, in which the powder coating is sprayed on the surface of the workpiece. Here, the powder is not directly sprayed on the surface of the workpiece, but is evenly adsorbed on the surface layer of the workpiece by using the electrostatic field at that time, forming a coating structure. The powder coating structure is then flow leveled and solidified by high-temperature baking in an oven, becoming the final coating with different effects. The spraying effect is better than the paint spraying process in terms of mechanical strength, adhesion, corrosion resistance and aging resistance.

[0092] The voiceprint sensor device increases the distance between the wall thickness of the shell and the circuit board, which meets the safety requirements between the PCBA (Printed Circuit Board Assembly) board and the shell. The requirements include: requirements for electrical clearance (spatial distance), creepage distance (along surface distance) and insulation penetration distance.

[0093] The sound sensor and the vibration sensor are integrated inside the acoustic fingerprint sensor device, are directly installed on the surface of the measured equipment (fan blade), and listen to sound information and vibration state information in real time when the equipment is running. The acoustic fingerprint sensor is connected with the collector through the CAN bus, and sensor data is uploaded to the collector in real time through the CAN bus.

[0094] The parameters of the sound sensor and the vibration sensor are shown in Table 1.

[0095] Table 1

[0096]

[0097] The acoustic fingerprint sensor circuit of the combined power fan blade provided in the embodiment of the application includes a first differential mode interference elimination module 110, a second differential mode interference elimination module 120, a first common mode interference elimination module 130, and a third differential mode interference elimination module 140. The first differential mode interference elimination module 110 is used to eliminate differential mode static electricity, electric fast transient impulse group, and differential mode surge interference. The second differential mode interference elimination module 120 is used to eliminate differential mode static interference. The first common mode interference elimination module 130 is used to eliminate common mode surge and electric fast transient impulse group interference. The third differential mode interference elimination module 140 is used to eliminate differential mode surge and electric fast transient impulse group interference.

[0098] The scheme provided in the application includes a differential mode interference elimination module and a common mode interference elimination module, which can eliminate differential mode interference and common mode interference, thereby improving the protection performance of the acoustic fingerprint sensor, can be used in harsh environments, and has strong ease of use and practicality.

[0099] The scheme provided in the application designs an MOV common mode and differential mode protection circuit and a TVS protection circuit at the power supply interface, and designs an ESD common mode and differential mode protection circuit and a GDT differential mode protection circuit at the CAN communication interface. The two parts as a whole play a role in surge protection and static protection.

[0100] The acoustic fingerprint sensor device increases protection devices such as a pressure-sensitive resistor, a discharge tube, a TVS tube, and an ESD tube at the power supply interface and the CAN communication interface, and increases a safety distance from the circuit on the board.

[0101] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution. The execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiment of the application.

[0102] In the above embodiments, the description of each embodiment has its own focus. The parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0103] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the technical solutions recorded in the above examples can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A joint powered fan blade voiceprint sensor circuit, characterized by, The circuit comprises a first differential mode interference elimination module, a second differential mode interference elimination module, a first common mode interference elimination module and a third differential mode interference elimination module; The first end and the second end of the first differential mode interference elimination module are connected to a direct current power supply input end, the third end of the first differential mode interference elimination module is connected to the first end of the first common mode interference elimination module, the fourth end of the first differential mode interference elimination module is connected to the second end of the first common mode interference elimination module, and the first differential mode interference elimination module is used for eliminating differential mode static electricity, electric fast transient pulse group and differential mode surge interference of the direct current power supply; The second differential mode interference elimination module is connected to high bit data lines and low bit data lines of differential signal lines of a communication bus and is used for eliminating differential mode static electricity interference; The first common mode interference elimination module is used for eliminating common mode surge and electric fast transient pulse group interference. The third differential mode interference elimination module is connected in parallel with the first differential mode interference elimination module and is used for eliminating differential mode surge and electric fast transient pulse group interference.

2. The combined power fan blade acoustic print sensor circuit of claim 1, wherein, The circuit further comprises a terminal, a positive electrode pin of the terminal is connected to a positive electrode input end of a direct current power supply, a negative electrode pin of the terminal is connected to a negative electrode input end of the direct current power supply, a high level signal pin of the terminal is connected to high bit data lines of differential signal lines of a communication bus, and a low level signal pin of the terminal is connected to low bit data lines of the differential signal lines of the communication bus; The first differential mode interference elimination module comprises a first ESD static electricity protection diode and a first pressure sensitive resistor; The cathode of the first ESD static electricity protection diode is connected to the negative electrode pin of the terminal and a first end of the first pressure sensitive resistor, and the anode of the first ESD static electricity protection diode is connected to the positive electrode pin of the terminal and a second end of the first pressure sensitive resistor; The cathode of the first ESD static electricity protection diode is used as a first direct current power supply output end, and the anode of the first ESD static electricity protection diode is also connected to ground.

3. The combined power fan blade acoustic print sensor circuit of claim 2, wherein, The second differential mode interference elimination module comprises a second ESD static electricity protection diode and a third ESD static electricity protection diode; The anode of the second ESD static electricity protection diode is connected to the high level signal pin of the terminal, the cathode of the third ESD static electricity protection diode is connected to the low level signal pin of the terminal, and the cathode of the second ESD static electricity protection diode and the anode of the third ESD static electricity protection diode are connected to ground.

4. The combined power fan blade acoustic print sensor circuit of claim 2, wherein, The first common mode interference elimination module comprises a second pressure sensitive resistor and a third pressure sensitive resistor; The first end of the second pressure sensitive resistor is connected to the positive electrode pin of the terminal, and the second end of the second pressure sensitive resistor is connected to a protection ground line; The first end of the third pressure sensitive resistor is connected to the negative electrode pin of the terminal, and the second end of the third pressure sensitive resistor is connected to the protection ground line.

5. The combined power fan blade acoustic print sensor circuit of claim 1, wherein, The third differential mode interference elimination module comprises a first transient voltage suppression diode, and the first transient voltage suppression diode is connected in parallel with the first differential mode interference elimination module.

6. The combined power fan blade acoustic print sensor circuit of claim 2, wherein, The circuit further comprises a first inductor, a first self-recovery fuse and an electrolytic capacitor. The first end of the first inductor is connected with the positive pole pin of the terminal of the power supply, and the second end of the first inductor is connected with the first end of the first self-resetting fuse, and the first inductor is used for filtering high-frequency interference of the DC power line; The second end of the first self-resetting fuse is connected with the first end of the third differential mode interference elimination module, and the second end of the first self-resetting fuse and the first end of the electrolytic capacitor constitute a second DC power output end, and the first self-resetting fuse is used for short-circuit protection of the DC power line. The second end of the electrolytic capacitor is connected with the second end of the third differential mode interference elimination module, and the electrolytic capacitor is used for voltage stabilization and ripple elimination.

7. The federated powered fan blade acoustic print sensor circuit of any of claims 1-6, wherein, The circuit further comprises a second common mode interference elimination module, a third common mode interference elimination module and a fourth differential mode interference elimination module; The second common mode interference elimination module is connected with high-bit data lines and low-bit data lines of differential signal lines of the communication bus, and is used for eliminating common mode surge and electric fast transient pulse group interference; The third common mode interference elimination module is connected in parallel with the second common mode interference elimination module, and is used for eliminating common mode surge and electric fast transient pulse group interference; The fourth differential mode interference elimination module is connected in parallel with the third common mode interference elimination module, and is used for eliminating differential mode surge and electric fast transient pulse group interference.

8. The combined power fan blade acoustic print sensor circuit of claim 7, wherein, The second common mode interference elimination module comprises a first gas discharge tube and a second gas discharge tube; The first gas discharge tube and the second gas discharge tube are connected in series between the differential signal lines, and a series connection node of the first gas discharge tube and the second gas discharge tube is connected with a protection ground line.

9. The combined power fan blade acoustic print sensor circuit of claim 7, wherein, The third common mode interference elimination module comprises a second transient voltage suppression diode, and the fourth differential mode interference elimination module comprises a third transient voltage suppression diode and a fourth transient voltage suppression diode; The second transient voltage suppression diode is connected in parallel with the second common mode interference elimination module, the third transient voltage suppression diode and the fourth transient voltage suppression diode are connected in series between the differential signal lines, and a series connection node of the third transient voltage suppression diode and the fourth transient voltage suppression diode is grounded.

10. The combined power fan blade acoustic print sensor circuit of claim 7, wherein, The circuit further comprises a second self-resetting fuse and a third self-resetting fuse; The first end of the second self-resetting fuse is connected with the first end of the second common mode interference elimination module, and the second end of the second self-resetting fuse is connected with the first end of the third common mode interference elimination module, and the second self-resetting fuse is used for short-circuit protection of the differential signal lines; The first end of the third self-resetting fuse is connected with the second end of the second common mode interference elimination module, and the second end of the third self-resetting fuse is connected with the second end of the third common mode interference elimination module, and the third self-resetting fuse is used for short-circuit protection of the differential signal lines.

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